I ate healthily, but there was no snacking, no drinking, no bread, no sugar, no smoking. Afterwards I had a pork belly roast.

I love doing impersonations of people.

My first, big, silly role at school was as Arthur Crocker-Harris in Rattigan's 'The Browning Version,' where my job was to make school-masters' wives weep with recognition.

Even the cerebral characters I play seem to have physical quirks. They're all "physically inhabited," for lack off a better expression. For instance, Sherlock Holmes has very particular physical gestures which are drawn out in such detail.

As an actor, to be part of that story's [Marvel univerce ] terrific. I've enjoyed it so much as a fan and now I'm getting to have a go myself.

Being a posh actor in England you cannot escape the class-typing from whatever side you look at it.

Being on set is quite difficult, because it's so big and you've got to try and relax, which isn't easy when you know you're in a massive film. I was terrified for quite a long time.